The atom of an element X combines with aluminium (\(_{13}\)AI). What is the formula of...

Chemistry

WAEC 2001

The atom of an element X combines with aluminium (\(_{13}\)AI). What is the formula of the compound formed?

A. AIX ₂
B. AI ₂X
C. AI₂X ₂
D. AI ₂X ₃

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

Correct Answer: Option D

Explanation

Even though we were not told if the element X were a monoatomic or diatomic, inasmuch as Aluminium has a valency of +3, and there is going to be an exchange of valency between the two atoms of elements combining, X will definitely take the 3 from Al, and from the options, only option D has X having 3. Consequently, the correct option is D.

Previous Next

Go back to Chem classroom

Report an Error Ask A Question Download App